A novel moving bed process for methanol to propylene (MMTP)

and conducts engineering analysis for this process were presented. Firstly

according to the principle that the reactor must be matched with reaction catalyst deactivation

the most matching reactor for ZSM-5 catalysts (with mid-level deactivation) is moving bed. Moreover

the MMTP process can not only exert higher propylene selectivity of the catalyst

but also can utilize medium particle circulation rate for reaction and regeneration to serialize and stabilize high yield of propylene process. Secondly

regarding the strong exothermal characteristics of the MMTP reaction

two kinds of processes

fluidized bed one-step operation and fixed bed two-step operation

are compared. Based on the comparison results

it is concluded that the two-step operation of MMTP process can allocate reasonable reaction heat and control product distribution with flexibility. Finally

through integration of heat-exchange network optimization and alcohol-oil refining process

MMTP process owns high propylene yield on the basis of water and energy saving. On the basis of current MMTP process

10000 t·a-1 propylene technology package design has been completed. In summary

MMTP owns visible competitive advantages both on technique and economics

which has high application potential in industry.